Preparing method and application of electrochemistry parathion sensor based on metal and metal oxide co-doped nanometer composite

A technology of nanocomposite materials and parathion, applied in the direction of material electrochemical variables, scientific instruments, analytical materials, etc., can solve the problems of poor conductivity, low sensitivity of electrochemical sensors, unfavorable practical applications, etc., to improve strength and stability properties, improve electron transfer ability and catalytic activity, and increase the effect of electron transfer ability

Active Publication Date: 2016-07-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor conductivity of titanium dioxide also limits the sensitivity of electrochemical sensors constructed from a single titanium dioxide nanomaterial, which is not conducive to practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1Co-MoO 3 / TiO 2 g-C 3 N 4 preparation of

[0034] First, add 0.6mmol sodium molybdate and 0.8mmol cobalt salt into 5mL tetrabutyl titanate, slowly add 0.5mL hydrofluoric acid during stirring, react in the reactor at 160°C for 24 hours, and cool to room temperature , after centrifuging and washing three times with ultrapure water and absolute ethanol, vacuum-dry at 50°C; secondly, take 150 mg of the dried solid and mix it with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace , the heating rate was 1°C / min, and calcined at 480°C for 5 hours; finally, the calcined powder was cooled to room temperature to obtain Co-MoO 3 / TiO 2 g-C 3 N 4 ;

[0035] The cobalt salt is cobalt sulfate.

Embodiment 2

[0036] Example 2Co-MoO 3 / TiO 2 g-C 3 N 4 preparation of

[0037] First, add 0.8mmol sodium molybdate and 1.0mmol cobalt salt to 5mL tetrabutyl titanate, slowly add 0.65mL hydrofluoric acid during stirring, react in the reactor at 180°C for 21 hours, and cool to room temperature , washed with ultrapure water and absolute ethanol for three times, then vacuum-dried at 50°C; secondly, take 200mg of the dried solid and mix it with 400mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace , the heating rate is 2°C / min, and calcined at 520°C for 2 hours; finally, the calcined powder is cooled to room temperature to obtain Co-MoO 3 / TiO 2 g-C 3 N 4 ;

[0038] Described cobalt salt is cobalt chloride.

Embodiment 3

[0039] Example 3Co-MoO 3 / TiO 2 g-C 3 N 4 preparation of

[0040] First, add 1.0mmol sodium molybdate and 1.2mmol cobalt salt into 5mL tetrabutyl titanate, slowly add 0.8mL hydrofluoric acid during stirring, react in the reactor at 200°C for 18 hours, and cool to room temperature , after centrifuging and washing with ultrapure water and absolute ethanol three times, vacuum drying at 50°C; secondly, take 250 mg of the dried solid and mix it with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace , the heating rate was 3°C / min, and calcined at 560°C for 0.5 hours; finally, the calcined powder was cooled to room temperature to obtain Co-MoO 3 / TiO 2 g-C 3 N 4 ;

[0041] The cobalt salt is cobalt nitrate.

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Abstract

The invention discloses a preparing method of an electrochemistry parathion sensor based on a metal and metal oxide co-doped nanometer composite, and belongs to the technical field of novel nanometer functional materials and biosensors. The preparing method comprises the steps that firstly, a novel two-dimensional manometer material Co-MoO3 / TiO2@g-C3N4 is prepared, and a parathion antibody is loaded by using the good biocompatibility and the large specific area of the material; secondly, horse radish peroxidase is fixed through the cross-linking action of glutaraldehyde, in the detection process, due to the fact that horse radish peroxidase can catalyze hydrogen peroxide to generate electrochemistry signals, then the influence on the electron transmittability by the specific and quantitative combination of the antibody and an antigen is used, the current intensity is reduced correspondingly, and finally the parathion detecting electrochemistry biosensor low in cost, high in sensitivity and specificity, fast in detection and easy to prepare is obtained.

Description

technical field [0001] The invention relates to a preparation method of an electrochemical parathion sensor. It belongs to the technical field of new nanometer functional materials and biosensors. Background technique [0002] Parathion is a broad-spectrum highly toxic insecticide, which has contact killing, stomach poisoning and fumigation effects, and can penetrate into plants. Parathion acts quickly on insects and can be used to control cotton, apple, citrus, pear, peach and other fruit tree pests and wheat red spiders. In the soil, parathion can migrate slightly to the deep layer of the soil through the leaching of water. Parathion in the soil can enter the plant through absorption by plant roots. After people eat such plants or plants containing their residues by mistake, parathion can enter the human body through the digestive tract, respiratory tract and intact skin and mucous membranes, causing nausea, vomiting, headache, diarrhea, and general weakness. Symptoms,...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30
CPCG01N27/26G01N27/30G01N27/301
Inventor 张勇吴丹李燕范大伟魏琴
Owner UNIV OF JINAN
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